forerunner 920xt corrupted file

My garmin forerunner 920xt produced a corrupt fit file at the Richmond Marathon last november. someone from this forum assisted me then to recover the data. Thanks. It was suggested to me to purge the fit files from my watch after each upload to avoid this glitch.  That solution was satisfactory for over four months until yesterday, when a 6 mile run resulted in the attached and zipped corrupted file. I tried to use some of the online tools to repair this file, but failed.  I ask the hive if someone can assist feb21.zipme again. Thanks in advance